Mr Etheridge on Fossils from Boivcn River Coalfield. 299 



crossing, in decomposed nodular ironstone of the Marine 

 Series, associated with Stenopora, Protoretepora, Fenestella, 

 etc. (No. 111). 



Collector.— K L. Jack, Esq., F.G.S. 



Genus JSTotomya— J/'Coy, 1847. 



(Annals Nat. Hist., 1847, xx., p. 303.) 



Section Mceonia — Dana, 1847.* 



(American Jour. Sc, 1S47, iv., p. 158. Emended, U.S. Explor. Exped., 

 Geology, p. 694.) 



Ohs. — In my recently published " Catalogue of Australian 

 Fossils ""I" I have called attention to the difficulties attending 

 a proper subdivision of the species of Dana's genera Mceonia 

 (vel. Myonia), Pyramia (vel. Py ramus), and Cleohis as pointed 

 out by the late Dr Stolitzka.^ In Professor Dana's first paper 

 on Australian Palaeontology contributed to the pages of the 

 American Journal of Science, the three were described as 

 separate and distinct genera, but in the more extended ac- 

 count of the geology of the Wilke's Exploring Expedition 

 they were united under the one name Mceonicc. Dana at the 

 same time stated that his Cleohis was identical with Notomya 

 (M'Coy). The arrangement adopted in my Catalogue was a 

 purely provisional one, proposed more as a temporary or 

 provisional arrangement than as an accurate solution of a 

 difficult and obscure subject, and such it must remain until 

 this group of Palaeozoic Bivalves can be examined and studied 

 as a whole. At the same time I gave my reasons for adopt- 

 ing the name Notomya (M'Coy), in preference to any of the 

 others. 



Notomya {Mceonia) recta — Dana. 



CleoUs recta, Dana, American Jour. Sc, 1847, iv., p. 154. 

 Mceonia{^)„ ,, Geol. U.S. Explor. Exped., p. 698, Atlas, t. 7, f. 2. 

 Mceonia „ Clarke, S. Goldfield's " K S. Wales," 1860, p. 287. 

 Notomya ,, Etheridge, jun., Cat. Australian Foss., 1878, p. 73. 



Obs. — The chief characters of this species are its very 

 inequilateral and oblong form with the parallel dorsal and 



* ISTon Myonia, Adams, 1860. f Tbid., pp. 71 and 72. 



:J: Pal. Indica., iii., p. 83. 



